Board-and-batten spacing
Calculate equal open gaps or center-to-center placement, plus a complete cut and position list.
Open calculator →Calculator library
DIY calculators built to show their work
Each released tool includes validated inputs, transparent formulas, a responsive diagram, shareable settings, and print-ready results.
Fence-picket spacing
Calculate an exact gap, required picket count, center spacing, material length, and every position.
Open calculator →Gallery-wall layout
Arrange multiple frame sizes, compare five layouts, and get exact frame centers and hook marks.
Open calculator →Deck materials
Estimate stock boards, rows, seams, waste, joist quantities, linear footage, and fasteners.
Open calculator →Roof pitch
Convert rise, run, angle, span, ridge rise, or rafter length into complete roof geometry.
Open calculator →Deck joist size
Enter a clear span and compare prescriptive 2×6 through 2×12 joists at common on-center spacing.
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